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Stock-based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | Stock-based compensation expense before income tax expense for the three and six-month periods ended June 30, 2014 and 2013, consisted of the following (in thousands):
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
Cost of goods sold | $ | 46 |  |  | $ | 26 |  |  | 89 |  |  | $ | 80 |
Research and development | 17 |  |  | 24 |  |  | 33 |  |  | 49 |
Selling, general, and administrative | 261 |  |  | 274 |  |  | 541 |  |  | 654 |
Stock-based compensation expense before taxes | $ | 324 |  |  | $ | 324 |  |  | $ | 663 |  |  | $ | 783 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | In applying the Black-Scholes methodology to our outstanding option grants, we used the following assumptions:
| Six Months Ended
| June 30, |  | June 30,
| 2014 |  | 2013
Risk-free interest rate | 1.97% |  | 0.65% - 1.16%
Expected option life | 5.5 years |  | 4.2 - 6.0 years
Expected dividend yield | —% |  | —%
Expected price volatility | 36.90% |  | 40.20% - 41.67%

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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